<!DOCTYPE html>
<html lang="en" style="font-size: 37.5px;">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>display</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        
        .box {
            height: 200px;
            background-color: green;
            display: table;
        }
        
        .left,
        .right {
            display: table-cell;
            height: 100%;
        }
        
        .left {
            background-color: pink;
            width: 3rem;
        }
        
        .right {
            width: 7rem;
            background-color: blue;
        }
    </style>
</head>

<body>
    <a href="#">我有<i>一</i>颗<span style="display: block;">马斯克</span>的心</a>
    <div class="box">
        <div class="left"></div>
        <div class="right"></div>
    </div>

</body>

</html>